./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 871be16186d4378aec884efd2352a47ca4eb57bc ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 02:51:42,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:51:42,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:51:42,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:51:42,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:51:42,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:51:42,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:51:42,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:51:42,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:51:42,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:51:42,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:51:42,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:51:42,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:51:42,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:51:42,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:51:42,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:51:42,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:51:42,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:51:42,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:51:42,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:51:42,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:51:42,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:51:42,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:51:42,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:51:42,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:51:42,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:51:42,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:51:42,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:51:42,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:51:42,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:51:42,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:51:42,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:51:42,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:51:42,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:51:42,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:51:42,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:51:42,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:51:42,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:51:42,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:51:42,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:51:42,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:51:42,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 02:51:42,967 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:51:42,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:51:42,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:51:42,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:51:42,969 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:51:42,969 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 02:51:42,969 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 02:51:42,969 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 02:51:42,969 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 02:51:42,970 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 02:51:42,970 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 02:51:42,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:51:42,970 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 02:51:42,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 02:51:42,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:51:42,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 02:51:42,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 02:51:42,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 02:51:42,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 02:51:42,972 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 02:51:42,972 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:51:42,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 02:51:42,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:51:42,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:51:42,973 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 02:51:42,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:51:42,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 02:51:42,973 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 02:51:42,974 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 02:51:42,975 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 871be16186d4378aec884efd2352a47ca4eb57bc [2019-11-20 02:51:43,109 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:51:43,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:51:43,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:51:43,125 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:51:43,127 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:51:43,128 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2019-11-20 02:51:43,190 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/data/670197618/3d78373ed934455a81e8cf285cc3228f/FLAGeeff5d493 [2019-11-20 02:51:43,574 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:51:43,575 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2019-11-20 02:51:43,580 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/data/670197618/3d78373ed934455a81e8cf285cc3228f/FLAGeeff5d493 [2019-11-20 02:51:44,012 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/data/670197618/3d78373ed934455a81e8cf285cc3228f [2019-11-20 02:51:44,015 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:51:44,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 02:51:44,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:51:44,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:51:44,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:51:44,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43768e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44, skipping insertion in model container [2019-11-20 02:51:44,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,037 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:51:44,050 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:51:44,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:51:44,295 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:51:44,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:51:44,326 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:51:44,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44 WrapperNode [2019-11-20 02:51:44,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:51:44,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 02:51:44,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 02:51:44,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 02:51:44,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 02:51:44,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:51:44,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:51:44,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:51:44,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... [2019-11-20 02:51:44,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:51:44,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:51:44,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:51:44,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:51:44,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:51:44,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:51:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2019-11-20 02:51:44,429 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2019-11-20 02:51:44,573 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:51:44,573 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 02:51:44,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:51:44 BoogieIcfgContainer [2019-11-20 02:51:44,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:51:44,575 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 02:51:44,575 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 02:51:44,579 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 02:51:44,579 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 02:51:44,580 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 02:51:44" (1/3) ... [2019-11-20 02:51:44,585 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@270d5638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 02:51:44, skipping insertion in model container [2019-11-20 02:51:44,585 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 02:51:44,585 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:51:44" (2/3) ... [2019-11-20 02:51:44,586 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@270d5638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 02:51:44, skipping insertion in model container [2019-11-20 02:51:44,586 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 02:51:44,586 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:51:44" (3/3) ... [2019-11-20 02:51:44,589 INFO L371 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion.c [2019-11-20 02:51:44,635 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 02:51:44,635 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 02:51:44,636 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 02:51:44,636 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:51:44,636 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:51:44,636 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 02:51:44,637 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:51:44,637 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 02:51:44,652 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2019-11-20 02:51:44,680 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 02:51:44,681 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:51:44,681 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:51:44,688 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 02:51:44,689 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 02:51:44,689 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 02:51:44,689 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2019-11-20 02:51:44,692 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 02:51:44,692 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:51:44,692 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:51:44,692 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 02:51:44,692 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 02:51:44,700 INFO L794 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 4#L16true call main_#t~ret3 := mc91(main_~x~0);< 5#mc91ENTRYtrue [2019-11-20 02:51:44,700 INFO L796 eck$LassoCheckResult]: Loop: 5#mc91ENTRYtrue ~n := #in~n; 9#L10true assume !(~n > 100); 11#L11true call #t~ret0 := mc91(11 + ~n);< 5#mc91ENTRYtrue [2019-11-20 02:51:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:44,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1008, now seen corresponding path program 1 times [2019-11-20 02:51:44,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:51:44,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490842186] [2019-11-20 02:51:44,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:51:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:44,805 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:51:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:44,806 INFO L82 PathProgramCache]: Analyzing trace with hash 36877, now seen corresponding path program 1 times [2019-11-20 02:51:44,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:51:44,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714158524] [2019-11-20 02:51:44,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:51:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:44,823 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:51:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 30036414, now seen corresponding path program 1 times [2019-11-20 02:51:44,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:51:44,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545643655] [2019-11-20 02:51:44,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:51:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:44,835 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:51:44,937 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:51:44,938 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:51:44,938 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:51:44,938 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:51:44,938 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:51:44,938 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:44,938 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:51:44,939 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:51:44,939 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2019-11-20 02:51:44,939 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:51:44,939 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:51:44,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:44,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:44,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:44,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:44,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:45,061 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:51:45,062 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:45,071 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:51:45,072 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:45,089 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:51:45,089 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:51:46,131 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:51:46,133 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:51:46,134 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:51:46,134 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:51:46,134 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:51:46,134 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:51:46,134 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:46,134 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:51:46,134 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:51:46,134 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2019-11-20 02:51:46,135 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:51:46,135 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:51:46,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:46,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:46,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:46,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:46,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:46,215 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:51:46,220 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:51:46,234 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:51:46,236 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:51:46,236 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:51:46,237 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:51:46,237 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:51:46,237 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:51:46,240 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:51:46,240 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:46,244 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:51:46,250 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 02:51:46,250 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:46,258 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:51:46,258 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:51:46,258 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:51:46,259 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2019-11-20 02:51:46,263 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:51:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:51:46,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 02:51:46,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:51:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:51:46,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:51:46,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:51:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:51:46,384 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-20 02:51:46,386 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states. Second operand 4 states. [2019-11-20 02:51:46,487 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states.. Second operand 4 states. Result 31 states and 38 transitions. Complement of second has 12 states. [2019-11-20 02:51:46,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 02:51:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 02:51:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2019-11-20 02:51:46,491 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2019-11-20 02:51:46,492 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:51:46,492 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-20 02:51:46,492 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:51:46,492 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-20 02:51:46,492 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:51:46,494 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 38 transitions. [2019-11-20 02:51:46,497 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 02:51:46,503 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 18 states and 24 transitions. [2019-11-20 02:51:46,504 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-11-20 02:51:46,505 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2019-11-20 02:51:46,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2019-11-20 02:51:46,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:51:46,506 INFO L688 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-11-20 02:51:46,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2019-11-20 02:51:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2019-11-20 02:51:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-20 02:51:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-20 02:51:46,537 INFO L711 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-20 02:51:46,537 INFO L591 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-20 02:51:46,538 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 02:51:46,538 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 20 transitions. [2019-11-20 02:51:46,539 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 02:51:46,539 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:51:46,539 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:51:46,540 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:51:46,540 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-20 02:51:46,540 INFO L794 eck$LassoCheckResult]: Stem: 100#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 96#L16 call main_#t~ret3 := mc91(main_~x~0);< 101#mc91ENTRY ~n := #in~n; 105#L10 assume !(~n > 100); 98#L11 call #t~ret0 := mc91(11 + ~n);< 107#mc91ENTRY ~n := #in~n; 103#L10 assume ~n > 100;#res := ~n - 10; 104#mc91FINAL assume true; 102#mc91EXIT >#19#return; 97#L11-1 [2019-11-20 02:51:46,541 INFO L796 eck$LassoCheckResult]: Loop: 97#L11-1 call #t~ret1 := mc91(#t~ret0);< 106#mc91ENTRY ~n := #in~n; 109#L10 assume !(~n > 100); 95#L11 call #t~ret0 := mc91(11 + ~n);< 106#mc91ENTRY ~n := #in~n; 109#L10 assume ~n > 100;#res := ~n - 10; 99#mc91FINAL assume true; 108#mc91EXIT >#19#return; 97#L11-1 [2019-11-20 02:51:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:46,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1934452539, now seen corresponding path program 1 times [2019-11-20 02:51:46,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:51:46,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326880706] [2019-11-20 02:51:46,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:51:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:46,556 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:51:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:46,557 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 1 times [2019-11-20 02:51:46,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:51:46,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123791400] [2019-11-20 02:51:46,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:51:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:46,569 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:51:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:46,569 INFO L82 PathProgramCache]: Analyzing trace with hash 418213862, now seen corresponding path program 1 times [2019-11-20 02:51:46,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:51:46,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122917793] [2019-11-20 02:51:46,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:51:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:46,606 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:51:46,725 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:51:46,725 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:51:46,725 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:51:46,725 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:51:46,725 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:51:46,726 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:46,726 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:51:46,726 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:51:46,726 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2019-11-20 02:51:46,726 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:51:46,726 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:51:46,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:46,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:46,734 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:46,789 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:51:46,789 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:51:46,799 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:51:46,799 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:46,804 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:51:46,804 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:51:46,815 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:51:46,815 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:46,822 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:51:46,822 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:51:46,836 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:51:46,836 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:46,864 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:51:46,864 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:51:58,921 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-11-20 02:51:58,925 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:51:58,925 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:51:58,925 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:51:58,925 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:51:58,925 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:51:58,926 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:58,926 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:51:58,926 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:51:58,926 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2019-11-20 02:51:58,926 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:51:58,926 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:51:58,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:58,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:58,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:51:59,002 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:51:59,003 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:51:59,016 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:51:59,018 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:51:59,018 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:51:59,018 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:51:59,018 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:51:59,019 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:51:59,019 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:51:59,020 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:59,023 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:51:59,040 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:51:59,042 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:51:59,042 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:51:59,042 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:51:59,042 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:51:59,043 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:51:59,044 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:51:59,044 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:59,047 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:59,063 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:51:59,065 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:51:59,065 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:51:59,065 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:51:59,065 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:51:59,066 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:51:59,072 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:51:59,073 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:51:59,076 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:51:59,080 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 02:51:59,080 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:51:59,102 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:51:59,103 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:51:59,103 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:51:59,103 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:51:59,106 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:51:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:51:59,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:51:59,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:51:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:51:59,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 02:51:59,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:51:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:51:59,392 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2019-11-20 02:51:59,392 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 20 transitions. cyclomatic complexity: 6 Second operand 9 states. [2019-11-20 02:51:59,862 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 20 transitions. cyclomatic complexity: 6. Second operand 9 states. Result 50 states and 72 transitions. Complement of second has 32 states. [2019-11-20 02:51:59,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2019-11-20 02:51:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-20 02:51:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2019-11-20 02:51:59,865 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 8 letters. [2019-11-20 02:51:59,866 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:51:59,866 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 17 letters. Loop has 8 letters. [2019-11-20 02:51:59,867 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:51:59,867 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 16 letters. [2019-11-20 02:51:59,867 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:51:59,868 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 72 transitions. [2019-11-20 02:51:59,872 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2019-11-20 02:51:59,875 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 41 states and 61 transitions. [2019-11-20 02:51:59,875 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-11-20 02:51:59,875 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-11-20 02:51:59,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 61 transitions. [2019-11-20 02:51:59,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:51:59,876 INFO L688 BuchiCegarLoop]: Abstraction has 41 states and 61 transitions. [2019-11-20 02:51:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 61 transitions. [2019-11-20 02:51:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2019-11-20 02:51:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 02:51:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2019-11-20 02:51:59,883 INFO L711 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2019-11-20 02:51:59,883 INFO L591 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2019-11-20 02:51:59,883 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 02:51:59,883 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 50 transitions. [2019-11-20 02:51:59,885 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2019-11-20 02:51:59,885 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:51:59,885 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:51:59,887 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:51:59,887 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 02:51:59,887 INFO L794 eck$LassoCheckResult]: Stem: 288#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 283#L16 call main_#t~ret3 := mc91(main_~x~0);< 289#mc91ENTRY ~n := #in~n; 295#L10 assume !(~n > 100); 284#L11 call #t~ret0 := mc91(11 + ~n);< 297#mc91ENTRY ~n := #in~n; 300#L10 assume ~n > 100;#res := ~n - 10; 306#mc91FINAL assume true; 305#mc91EXIT >#19#return; 277#L11-1 call #t~ret1 := mc91(#t~ret0);< 292#mc91ENTRY ~n := #in~n; 309#L10 assume !(~n > 100); 294#L11 [2019-11-20 02:51:59,887 INFO L796 eck$LassoCheckResult]: Loop: 294#L11 call #t~ret0 := mc91(11 + ~n);< 296#mc91ENTRY ~n := #in~n; 293#L10 assume !(~n > 100); 294#L11 [2019-11-20 02:51:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:59,888 INFO L82 PathProgramCache]: Analyzing trace with hash 595607827, now seen corresponding path program 2 times [2019-11-20 02:51:59,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:51:59,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282408804] [2019-11-20 02:51:59,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:51:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:59,927 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:51:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash 47317, now seen corresponding path program 2 times [2019-11-20 02:51:59,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:51:59,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911272425] [2019-11-20 02:51:59,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:51:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:51:59,933 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:51:59,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:51:59,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1242891907, now seen corresponding path program 3 times [2019-11-20 02:51:59,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:51:59,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83413856] [2019-11-20 02:51:59,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:51:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 02:52:00,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83413856] [2019-11-20 02:52:00,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:52:00,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 02:52:00,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603940567] [2019-11-20 02:52:00,105 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:52:00,106 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:52:00,106 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:52:00,106 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:52:00,106 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:52:00,106 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:00,106 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:52:00,107 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:52:00,107 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2019-11-20 02:52:00,107 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:52:00,107 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:52:00,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:00,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:00,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:00,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:00,165 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:52:00,165 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:52:00,170 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:52:00,170 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:00,175 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:52:00,175 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:00,190 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:52:00,190 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:52:00,198 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:52:00,198 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:52:00,216 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:52:00,216 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:00,237 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:52:00,237 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:52:12,266 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-11-20 02:52:12,269 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:52:12,270 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:52:12,270 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:52:12,270 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:52:12,270 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:52:12,270 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:12,270 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:52:12,270 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:52:12,270 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2019-11-20 02:52:12,270 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:52:12,271 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:52:12,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:12,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:12,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:12,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:12,323 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:52:12,323 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:12,339 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:52:12,341 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:52:12,341 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:52:12,341 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:52:12,341 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:52:12,342 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:52:12,342 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:52:12,343 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:52:12,344 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:52:12,358 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:52:12,360 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:52:12,360 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:52:12,360 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:52:12,360 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:52:12,360 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:52:12,361 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:52:12,361 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:12,365 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:12,386 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:52:12,388 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:52:12,388 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:52:12,388 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:52:12,388 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:52:12,388 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:52:12,394 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:52:12,394 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:52:12,400 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:52:12,403 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 02:52:12,403 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:52:12,417 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:52:12,417 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:52:12,418 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:52:12,418 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2019-11-20 02:52:12,420 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:12,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:52:12,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:12,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:52:12,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:52:12,565 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 02:52:12,565 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-11-20 02:52:24,727 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 42 states and 58 transitions. Complement of second has 13 states. [2019-11-20 02:52:24,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-20 02:52:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:52:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2019-11-20 02:52:24,729 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2019-11-20 02:52:24,729 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:24,729 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:52:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:24,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:52:24,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:24,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:52:24,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:52:24,865 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 02:52:24,865 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2019-11-20 02:52:25,014 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 42 states and 58 transitions. Complement of second has 13 states. [2019-11-20 02:52:25,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-20 02:52:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:52:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2019-11-20 02:52:25,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2019-11-20 02:52:25,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:25,019 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:52:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:25,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:52:25,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:25,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:52:25,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:52:25,127 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 02:52:25,127 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2019-11-20 02:52:37,263 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 70 states and 99 transitions. Complement of second has 16 states. [2019-11-20 02:52:37,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-20 02:52:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:52:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2019-11-20 02:52:37,265 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2019-11-20 02:52:37,266 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:37,266 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 15 letters. Loop has 3 letters. [2019-11-20 02:52:37,266 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:37,267 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 6 letters. [2019-11-20 02:52:37,267 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:37,267 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 70 states and 99 transitions. [2019-11-20 02:52:37,270 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-20 02:52:37,273 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 70 states to 47 states and 73 transitions. [2019-11-20 02:52:37,273 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-11-20 02:52:37,273 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2019-11-20 02:52:37,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 73 transitions. [2019-11-20 02:52:37,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:52:37,274 INFO L688 BuchiCegarLoop]: Abstraction has 47 states and 73 transitions. [2019-11-20 02:52:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 73 transitions. [2019-11-20 02:52:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2019-11-20 02:52:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 02:52:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2019-11-20 02:52:37,281 INFO L711 BuchiCegarLoop]: Abstraction has 41 states and 59 transitions. [2019-11-20 02:52:37,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:52:37,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 02:52:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-20 02:52:37,284 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand 8 states. [2019-11-20 02:52:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:52:37,399 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-11-20 02:52:37,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 02:52:37,400 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2019-11-20 02:52:37,403 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-11-20 02:52:37,405 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 57 states and 74 transitions. [2019-11-20 02:52:37,406 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2019-11-20 02:52:37,406 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2019-11-20 02:52:37,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 74 transitions. [2019-11-20 02:52:37,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:52:37,406 INFO L688 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2019-11-20 02:52:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 74 transitions. [2019-11-20 02:52:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-11-20 02:52:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-20 02:52:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2019-11-20 02:52:37,417 INFO L711 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2019-11-20 02:52:37,417 INFO L591 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2019-11-20 02:52:37,417 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 02:52:37,418 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 73 transitions. [2019-11-20 02:52:37,419 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-11-20 02:52:37,419 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:52:37,419 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:52:37,421 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-20 02:52:37,421 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2019-11-20 02:52:37,421 INFO L794 eck$LassoCheckResult]: Stem: 818#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 819#L16 call main_#t~ret3 := mc91(main_~x~0);< 820#mc91ENTRY ~n := #in~n; 846#L10 assume !(~n > 100); 839#L11 call #t~ret0 := mc91(11 + ~n);< 841#mc91ENTRY ~n := #in~n; 844#L10 assume !(~n > 100); 838#L11 call #t~ret0 := mc91(11 + ~n);< 842#mc91ENTRY ~n := #in~n; 845#L10 assume ~n > 100;#res := ~n - 10; 843#mc91FINAL assume true; 840#mc91EXIT >#19#return; 810#L11-1 call #t~ret1 := mc91(#t~ret0);< 825#mc91ENTRY ~n := #in~n; 859#L10 assume ~n > 100;#res := ~n - 10; 858#mc91FINAL assume true; 855#mc91EXIT >#21#return; 815#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 853#mc91FINAL assume true; 852#mc91EXIT >#19#return; 814#L11-1 call #t~ret1 := mc91(#t~ret0);< 851#mc91ENTRY [2019-11-20 02:52:37,421 INFO L796 eck$LassoCheckResult]: Loop: 851#mc91ENTRY ~n := #in~n; 847#L10 assume !(~n > 100); 822#L11 call #t~ret0 := mc91(11 + ~n);< 831#mc91ENTRY ~n := #in~n; 828#L10 assume !(~n > 100); 821#L11 call #t~ret0 := mc91(11 + ~n);< 832#mc91ENTRY ~n := #in~n; 826#L10 assume ~n > 100;#res := ~n - 10; 827#mc91FINAL assume true; 833#mc91EXIT >#19#return; 807#L11-1 call #t~ret1 := mc91(#t~ret0);< 823#mc91ENTRY ~n := #in~n; 849#L10 assume ~n > 100;#res := ~n - 10; 850#mc91FINAL assume true; 854#mc91EXIT >#21#return; 815#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 853#mc91FINAL assume true; 852#mc91EXIT >#19#return; 813#L11-1 call #t~ret1 := mc91(#t~ret0);< 851#mc91ENTRY [2019-11-20 02:52:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:37,422 INFO L82 PathProgramCache]: Analyzing trace with hash -104606680, now seen corresponding path program 1 times [2019-11-20 02:52:37,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:52:37,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271710091] [2019-11-20 02:52:37,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:52:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:52:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:52:37,444 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:52:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:37,446 INFO L82 PathProgramCache]: Analyzing trace with hash -735472521, now seen corresponding path program 1 times [2019-11-20 02:52:37,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:52:37,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458259076] [2019-11-20 02:52:37,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:52:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:52:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:52:37,476 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:52:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash -726341392, now seen corresponding path program 2 times [2019-11-20 02:52:37,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:52:37,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991558839] [2019-11-20 02:52:37,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:52:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-20 02:52:37,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991558839] [2019-11-20 02:52:37,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797803468] [2019-11-20 02:52:37,624 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:52:37,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:52:37,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:52:37,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:52:37,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-20 02:52:37,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:52:37,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-20 02:52:37,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361809512] [2019-11-20 02:52:37,887 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:52:37,887 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:52:37,887 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:52:37,887 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:52:37,887 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:52:37,888 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:37,888 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:52:37,888 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:52:37,888 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2019-11-20 02:52:37,888 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:52:37,888 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:52:37,889 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:37,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:37,892 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:37,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:37,901 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:37,932 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:52:37,932 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:37,937 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:52:37,937 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:52:37,940 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:52:37,940 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:37,952 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:52:37,952 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:52:37,955 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:52:37,955 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:37,959 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:52:37,959 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:52:37,962 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:52:37,962 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:37,969 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:52:37,969 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:37,975 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:52:37,976 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:52:38,365 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:52:38,367 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:52:38,367 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:52:38,367 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:52:38,367 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:52:38,368 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:52:38,368 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:38,368 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:52:38,368 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:52:38,368 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2019-11-20 02:52:38,368 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:52:38,368 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:52:38,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:38,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:38,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:38,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:38,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:38,430 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:52:38,430 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:38,435 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:52:38,436 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:52:38,436 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:52:38,436 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:52:38,436 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:52:38,436 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:52:38,437 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:52:38,437 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:52:38,441 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:38,447 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:52:38,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:52:38,449 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:52:38,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:52:38,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:52:38,450 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:52:38,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:52:38,450 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:52:38,457 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:52:38,466 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:52:38,468 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:52:38,468 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:52:38,468 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:52:38,468 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:52:38,469 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:52:38,469 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:52:38,469 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:38,471 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:52:38,481 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:52:38,483 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:52:38,483 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:52:38,483 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:52:38,483 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:52:38,483 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:52:38,485 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:52:38,485 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:38,487 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:52:38,490 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 02:52:38,490 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:52:38,494 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:52:38,494 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:52:38,494 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:52:38,494 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2019-11-20 02:52:38,496 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:38,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 02:52:38,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:38,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:38,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:38,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 02:52:38,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 02:52:38,791 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2019-11-20 02:52:38,791 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2019-11-20 02:52:39,232 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 124 states and 149 transitions. Complement of second has 47 states. [2019-11-20 02:52:39,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2019-11-20 02:52:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-20 02:52:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2019-11-20 02:52:39,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2019-11-20 02:52:39,234 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:39,234 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:52:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:39,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 02:52:39,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:39,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:39,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:39,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 02:52:39,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 02:52:39,502 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2019-11-20 02:52:39,503 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2019-11-20 02:52:39,936 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 124 states and 149 transitions. Complement of second has 47 states. [2019-11-20 02:52:39,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2019-11-20 02:52:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-20 02:52:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2019-11-20 02:52:39,938 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2019-11-20 02:52:39,938 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:39,938 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:52:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:39,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 02:52:39,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:39,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:39,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:40,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 02:52:40,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 02:52:40,192 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2019-11-20 02:52:40,192 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2019-11-20 02:52:40,921 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 430 states and 530 transitions. Complement of second has 216 states. [2019-11-20 02:52:40,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 20 states 2 stem states 17 non-accepting loop states 1 accepting loop states [2019-11-20 02:52:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-20 02:52:40,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 48 transitions. [2019-11-20 02:52:40,924 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 19 letters. [2019-11-20 02:52:40,924 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:40,925 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 40 letters. Loop has 19 letters. [2019-11-20 02:52:40,925 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:40,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 38 letters. [2019-11-20 02:52:40,926 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:40,927 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 430 states and 530 transitions. [2019-11-20 02:52:40,939 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 29 [2019-11-20 02:52:40,946 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 430 states to 202 states and 268 transitions. [2019-11-20 02:52:40,946 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94 [2019-11-20 02:52:40,947 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2019-11-20 02:52:40,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 202 states and 268 transitions. [2019-11-20 02:52:40,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:52:40,948 INFO L688 BuchiCegarLoop]: Abstraction has 202 states and 268 transitions. [2019-11-20 02:52:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states and 268 transitions. [2019-11-20 02:52:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2019-11-20 02:52:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-20 02:52:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 197 transitions. [2019-11-20 02:52:40,967 INFO L711 BuchiCegarLoop]: Abstraction has 156 states and 197 transitions. [2019-11-20 02:52:40,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:52:40,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 02:52:40,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-20 02:52:40,968 INFO L87 Difference]: Start difference. First operand 156 states and 197 transitions. Second operand 11 states. [2019-11-20 02:52:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:52:41,245 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2019-11-20 02:52:41,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 02:52:41,246 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 158 states and 187 transitions. [2019-11-20 02:52:41,250 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-11-20 02:52:41,252 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 158 states to 103 states and 122 transitions. [2019-11-20 02:52:41,252 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2019-11-20 02:52:41,253 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 75 [2019-11-20 02:52:41,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 122 transitions. [2019-11-20 02:52:41,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:52:41,253 INFO L688 BuchiCegarLoop]: Abstraction has 103 states and 122 transitions. [2019-11-20 02:52:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states and 122 transitions. [2019-11-20 02:52:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2019-11-20 02:52:41,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-20 02:52:41,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2019-11-20 02:52:41,262 INFO L711 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2019-11-20 02:52:41,262 INFO L591 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2019-11-20 02:52:41,262 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 02:52:41,262 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 99 states and 118 transitions. [2019-11-20 02:52:41,263 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-11-20 02:52:41,264 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:52:41,264 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:52:41,265 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1] [2019-11-20 02:52:41,265 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-20 02:52:41,269 INFO L794 eck$LassoCheckResult]: Stem: 2845#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 2846#L16 call main_#t~ret3 := mc91(main_~x~0);< 2847#mc91ENTRY ~n := #in~n; 2854#L10 assume !(~n > 100); 2855#L11 call #t~ret0 := mc91(11 + ~n);< 2877#mc91ENTRY ~n := #in~n; 2879#L10 assume !(~n > 100); 2878#L11 call #t~ret0 := mc91(11 + ~n);< 2896#mc91ENTRY ~n := #in~n; 2898#L10 assume ~n > 100;#res := ~n - 10; 2897#mc91FINAL assume true; 2895#mc91EXIT >#19#return; 2891#L11-1 call #t~ret1 := mc91(#t~ret0);< 2893#mc91ENTRY ~n := #in~n; 2910#L10 assume ~n > 100;#res := ~n - 10; 2899#mc91FINAL assume true; 2890#mc91EXIT >#21#return; 2889#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 2887#mc91FINAL assume true; 2886#mc91EXIT >#19#return; 2880#L11-1 call #t~ret1 := mc91(#t~ret0);< 2885#mc91ENTRY ~n := #in~n; 2883#L10 assume !(~n > 100); 2848#L11 call #t~ret0 := mc91(11 + ~n);< 2858#mc91ENTRY ~n := #in~n; 2888#L10 assume !(~n > 100); 2840#L11 call #t~ret0 := mc91(11 + ~n);< 2859#mc91ENTRY ~n := #in~n; 2864#L10 assume ~n > 100;#res := ~n - 10; 2929#mc91FINAL assume true; 2839#mc91EXIT >#19#return; 2841#L11-1 [2019-11-20 02:52:41,270 INFO L796 eck$LassoCheckResult]: Loop: 2841#L11-1 call #t~ret1 := mc91(#t~ret0);< 2849#mc91ENTRY ~n := #in~n; 2926#L10 assume !(~n > 100); 2856#L11 call #t~ret0 := mc91(11 + ~n);< 2857#mc91ENTRY ~n := #in~n; 2931#L10 assume ~n > 100;#res := ~n - 10; 2930#mc91FINAL assume true; 2928#mc91EXIT >#19#return; 2841#L11-1 [2019-11-20 02:52:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:41,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1788916079, now seen corresponding path program 3 times [2019-11-20 02:52:41,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:52:41,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106259458] [2019-11-20 02:52:41,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:52:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-20 02:52:41,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106259458] [2019-11-20 02:52:41,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863995357] [2019-11-20 02:52:41,379 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:52:41,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 02:52:41,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:52:41,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:52:41,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 02:52:41,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:52:41,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2019-11-20 02:52:41,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097781368] [2019-11-20 02:52:41,424 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 02:52:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 2 times [2019-11-20 02:52:41,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:52:41,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688493976] [2019-11-20 02:52:41,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:52:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:52:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:52:41,428 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:52:41,502 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:52:41,502 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:52:41,502 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:52:41,502 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:52:41,502 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:52:41,502 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:41,502 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:52:41,503 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:52:41,503 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2019-11-20 02:52:41,503 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:52:41,503 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:52:41,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:41,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:41,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:41,542 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:52:41,543 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:41,552 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:52:41,552 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:52:41,555 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:52:41,555 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:41,560 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:52:41,560 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:41,578 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:52:41,578 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:52:53,641 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-11-20 02:52:53,644 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:52:53,644 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:52:53,644 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:52:53,644 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:52:53,644 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:52:53,644 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:53,645 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:52:53,645 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:52:53,645 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2019-11-20 02:52:53,645 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:52:53,645 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:52:53,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:53,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:53,656 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:52:53,685 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:52:53,685 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:53,689 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:52:53,690 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:52:53,690 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:52:53,690 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:52:53,691 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:52:53,691 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:52:53,691 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:52:53,691 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:52:53,692 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:53,696 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:52:53,698 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:52:53,698 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:52:53,698 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:52:53,698 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:52:53,698 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:52:53,700 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:52:53,700 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:52:53,702 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:52:53,704 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 02:52:53,704 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43bfb0d6-f2e6-45f3-8d39-bca6ef80802f/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:52:53,706 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:52:53,707 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:52:53,707 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:52:53,707 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2019-11-20 02:52:53,708 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:52:53,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:53,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:52:53,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:53,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:53,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:53,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 02:52:53,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:52:53,899 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2019-11-20 02:52:53,899 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2019-11-20 02:52:54,114 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 138 states and 160 transitions. Complement of second has 24 states. [2019-11-20 02:52:54,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2019-11-20 02:52:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-20 02:52:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2019-11-20 02:52:54,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2019-11-20 02:52:54,117 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:54,117 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:52:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:54,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:52:54,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:54,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:54,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:54,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 02:52:54,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:52:54,343 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2019-11-20 02:52:54,343 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2019-11-20 02:52:54,571 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 138 states and 160 transitions. Complement of second has 24 states. [2019-11-20 02:52:54,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2019-11-20 02:52:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-20 02:52:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2019-11-20 02:52:54,572 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2019-11-20 02:52:54,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:54,573 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:52:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:52:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:54,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:52:54,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:54,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:54,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:52:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:52:54,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 02:52:54,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:52:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:52:54,735 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2019-11-20 02:52:54,735 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2019-11-20 02:52:54,963 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 180 states and 210 transitions. Complement of second has 27 states. [2019-11-20 02:52:54,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2019-11-20 02:52:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-20 02:52:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2019-11-20 02:52:54,965 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 8 letters. [2019-11-20 02:52:54,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:54,966 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-20 02:52:54,967 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:54,967 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 16 letters. [2019-11-20 02:52:54,968 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:52:54,968 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 180 states and 210 transitions. [2019-11-20 02:52:54,971 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 02:52:54,971 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 180 states to 0 states and 0 transitions. [2019-11-20 02:52:54,971 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 02:52:54,971 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 02:52:54,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 02:52:54,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 02:52:54,972 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:52:54,972 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:52:54,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:52:54,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 02:52:54,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 02:52:54,972 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 9 states. [2019-11-20 02:52:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:52:54,973 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-20 02:52:54,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 02:52:54,973 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-20 02:52:54,973 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 02:52:54,973 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 02:52:54,973 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 02:52:54,974 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 02:52:54,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 02:52:54,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 02:52:54,974 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:52:54,974 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:52:54,974 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:52:54,974 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-20 02:52:54,974 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 02:52:54,975 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 02:52:54,975 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 02:52:54,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 02:52:54 BoogieIcfgContainer [2019-11-20 02:52:54,981 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 02:52:54,981 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 02:52:54,981 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 02:52:54,981 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 02:52:54,982 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:51:44" (3/4) ... [2019-11-20 02:52:54,985 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 02:52:54,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 02:52:54,986 INFO L168 Benchmark]: Toolchain (without parser) took 70969.42 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 269.5 MB). Free memory was 951.4 MB in the beginning and 780.3 MB in the end (delta: 171.1 MB). Peak memory consumption was 440.6 MB. Max. memory is 11.5 GB. [2019-11-20 02:52:54,986 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:52:54,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.21 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.8 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -152.4 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2019-11-20 02:52:54,987 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.60 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:52:54,988 INFO L168 Benchmark]: Boogie Preprocessor took 11.13 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:52:54,988 INFO L168 Benchmark]: RCFGBuilder took 198.74 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 11.5 GB. [2019-11-20 02:52:54,989 INFO L168 Benchmark]: BuchiAutomizer took 70405.30 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 155.7 MB). Free memory was 1.1 GB in the beginning and 780.3 MB in the end (delta: 307.5 MB). Peak memory consumption was 463.2 MB. Max. memory is 11.5 GB. [2019-11-20 02:52:54,989 INFO L168 Benchmark]: Witness Printer took 3.85 ms. Allocated memory is still 1.3 GB. Free memory is still 780.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:52:54,991 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 310.21 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.8 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -152.4 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.60 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.13 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 198.74 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 70405.30 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 155.7 MB). Free memory was 1.1 GB in the beginning and 780.3 MB in the end (delta: 307.5 MB). Peak memory consumption was 463.2 MB. Max. memory is 11.5 GB. * Witness Printer took 3.85 ms. Allocated memory is still 1.3 GB. Free memory is still 780.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (3 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function -2 * \old(n) + 211 and consists of 4 locations. One deterministic module has affine ranking function -2 * aux-mc91(n+11)-aux + 201 and consists of 8 locations. One nondeterministic module has affine ranking function -2 * n + 189 and consists of 6 locations. One nondeterministic module has affine ranking function -1 * \old(n) + 90 and consists of 20 locations. One nondeterministic module has affine ranking function -2 * aux-mc91(n+11)-aux + 201 and consists of 8 locations. 3 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 70.3s and 6 iterations. TraceHistogramMax:7. Analysis of lassos took 40.2s. Construction of modules took 25.0s. Büchi inclusion checks took 4.8s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 65 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 99 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 12/24 HoareTripleCheckerStatistics: 154 SDtfs, 272 SDslu, 161 SDs, 0 SdLazy, 744 SolverSat, 236 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 25.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf96 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq166 hnf92 smp100 dnf100 smp100 tf109 neg100 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 37ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 3 LassoNonterminationAnalysisTime: 37.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...